Back manipulator



FIG. 1 is a view from the front and one side

FIG. 2 is a rear end view

FIG. 3 is a front end view

FIG. 4 is a view from said one side

FIG. 5 is a top plan view; and,

FIG. 6 is an underneath plan view. 

The ornamental design for a back manipulator, as shown. 